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  <title>Key PHP 5.1.x features</title>

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  <h2 class="title">Key PHP 5.1.x features</h2>
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   Some of the key features of PHP 5.1.x include:
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     A complete rewrite of date handling code, with improved timezone support.
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     Significant performance improvements compared to PHP 5.0.X.
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     PDO extension is now enabled by default.
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     Over 30 new functions in various extensions and built-in functionality.
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     Over 400 various bug fixes.
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